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T    S
0 48.1
8 46.97
16 44.63
24 39.98
32 38.32
40 37.69
48 37.11
56 35.98
64 35.66
72 33.09
80 32.11
88 31.96
96 31.89
120 31.34
144 31.86
168 32.51
192 31.66


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xiegangmai(½ð±Ò+2): лл²ÎÓ룡 2011-08-26 07:08:13
-(1/2)*a*c*ln(b*c+S*c+S^2)+a*c^2*arctan((c+2*S)/sqrt(4*b*c-c^2))/sqrt(4*b*c-c^2)
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xiegangmai(½ð±Ò+1): лл²ÎÓ룡 2011-08-26 07:08:27
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Constant x=214.63;
Parameter q=[0,0.5], k=[0,];
Variable t,s;
ODEFunction s' = -q*S*X/(k+S);
Data;
t=[0 2 7 9 19 22 24 26 28 30 32 40];
S=[255.55 246.44 237.28 228.36 136.08 114 99.16 82.33 69.4 56.94 42.31 0];
6Â¥2011-08-25 08:21:24
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knots = 3; K = 3;  %(3´ÎBÑùÌõ)
sp=spap2(knots,K,T,S);
sp=spap2(newknt(sp),K,T,S);
pp=fnder(sp)
dSdt=fnval(pp,T)

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dS/dt=-a*S/(b+S+SµÄƽ·½/c)
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dSdt =[-0.3407   -0.3114   -0.2820   -0.2527   -0.2233   -0.1940   -0.1646   -0.1352 -0.1130   -0.0947   -0.0765   -0.0583   -0.0400    0.0146    0.0123   -0.0034  -0.0191];
S    =[48.1      46.97      44.63     39.98      38.32     37.69     37.11    35.98    35.66    33.09      32.11   31.96     31.89       31.34     31.86   32.51      31.66];
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